Handle generator 50W

Hi members!

I am now working on handle generator project and I really want to know some kind of this with the range rated power around 50W in the market.

I am very thankful to you if you can help me by introducing some products as well as producer..

Sincerely;

Here is a search of google.com for the words...

hand crank power generator

http://www.google.com/search?hl=en&q=hand+crank+power+generator&btnG=Google+Search&aq=f&oq=&aqi=